//==============================================================================
//	
//	Copyright (c) 2002-
//	Authors:
//	* Andrew Hinton <ug60axh@cs.bham.ac.uk> (University of Birmingham)
//	
//------------------------------------------------------------------------------
//	
//	This file is part of PRISM.
//	
//	PRISM is free software; you can redistribute it and/or modify
//	it under the terms of the GNU General Public License as published by
//	the Free Software Foundation; either version 2 of the License, or
//	(at your option) any later version.
//	
//	PRISM is distributed in the hope that it will be useful,
//	but WITHOUT ANY WARRANTY; without even the implied warranty of
//	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//	GNU General Public License for more details.
//	
//	You should have received a copy of the GNU General Public License
//	along with PRISM; if not, write to the Free Software Foundation,
//	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//	
//==============================================================================

package settings;

import javax.swing.*;
import java.awt.*;
import javax.swing.event.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.util.*;

public class ChoiceEditor implements SettingEditor, ActionListener, FocusListener
{
    private Font font = new Font("monospaced", Font.PLAIN, 12);
    private String[]choices;
    private JComboBox combo;
    
    private JTable lastTable;
    private int tableRow = -1;
    private int tableCol = -1;
    
    private boolean modified = false;
    
    /** Creates a new instance of ChoiceEditor */
    public ChoiceEditor(String[]choices)
    {
        combo = new JComboBox(choices);
        combo.addActionListener(this);
        combo.addFocusListener(this);
        this.choices = choices;
    }
    
    public Object getEditorValue() throws SettingException
    {
        if(modified)
        {
            modified = false;
            if(combo.getSelectedItem() != null)
                return combo.getSelectedItem().toString();
            else return NOT_CHANGED_VALUE;
        }
        else return NOT_CHANGED_VALUE;
    }
    
    public Component getTableCellEditorComponent(JTable table, Setting owner, Object value, boolean isSelected, int row, int column)
    {
        
        if (isSelected)
        {
            combo.setForeground(table.getSelectionForeground());
            combo.setBackground(table.getSelectionBackground());
        }
        else
        {
            combo.setForeground(table.getForeground());
            combo.setBackground(table.getBackground());
        }
        
        
        combo.setBorder( new EmptyBorder(0,0,0,0));//UIManager.getBorder("Table.focusCellHighlightBorder") );
        combo.setFont(font);
        combo.setFocusable(false);
        
        if(value instanceof String)
        {
            int index = -1;
            for(int i = 0; i < choices.length; i++)
            {
                if(choices[i].equals(value.toString()))
                {
                    index = i; break;
                }
            }
            combo.setSelectedIndex(index);
        }
        else if(value instanceof ArrayList)
        {
            ArrayList values = (ArrayList)value;
            if(values.size() > 0)
            {
                //if we have multiple properties selected.
                String last = null;
                boolean allSame = true;
                for(int i = 0; i < values.size(); i++)
                {
                    if(values.get(i) instanceof String)
                    {
                        String str = (String)values.get(i);
                        if(last != null)
                        {
                            if(!str.equals(last))
                            {
                                allSame = false; break;
                            }
                            last = str;
                        }
                        else
                        {
                            last = str;
                        }
                    }
                }
                if(allSame)
                {
                    
                    int index = -1;
                    for(int i = 0; i < choices.length; i++)
                    {
                        if(choices[i].equals(last))
                        {
                            index = i; break;
                        }
                    }
                    combo.setSelectedIndex(index);
                }
                else
                {
                    combo.setSelectedIndex(-1);
                    
                }
                
            }
        }
        
        lastTable = table;
        tableRow = row;
        tableCol = column;
        return combo;
    }
    
    public void stopEditing()
    {
    }
    
    public void actionPerformed(ActionEvent e)
    {
        modified = true;
        if(lastTable != null)
            lastTable.editingStopped(new ChangeEvent(this));
    }
    
    public void focusGained(FocusEvent e)
    {
    }
    
    public void focusLost(FocusEvent e)
    {
        if(lastTable.getCellEditor() != null) lastTable.removeEditor();
    }
    
}
